Method for making an ambient light curable ethylene propylene diene terpolymer rubber coating devoid of thermally activated accelerators

ABSTRACT

A durable ambient light curable waterproof liquid rubber coating with volatile organic compound (VOC) content of less than 450 grams per liter made from ethylene propylene diene terpolymer (EPDM) in a solvent, a photoinitiator, an additive, pigments, and fillers, and a co-agent and a method for making the formulation, wherein the formulation is devoid of thermally activated accelerators.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority to and the benefit of U.S.Provisional Patent Application Ser. No. 61/764,471 filed on Feb. 13,2013, entitled “AMBIENT LIGHT CURABLE ETHYLENE PROPYLENE DIENE MONOMERRUBBER COATING DEVOID OF THERMALLY ACTIVATED ACCELERATORS”; U.S.Provisional Patent Application Ser. No. 61/764,479 filed on Feb. 13,2013, entitled “DUAL CURABLE ETHYLENE PROPYLENE DIENE MONOMER RUBBERCOATING USING A PHOTOINITIATOR AND A PEROXIDE”; and U.S. ProvisionalPatent Application Ser. No. 61/764,483 filed on Feb. 13, 2013, entitled“HIGH SOLIDS LOW VOC CONTENT ETHYLENE PROPYLENE DIENE RUBBER COATING.”These references are hereby incorporated in their entirety.

FIELD

The present embodiments generally relate to a method for making ambientlight curable liquid ethylene propylene diene terpolymer rubber coatingcompositions with a volatile organic compound content of less than 450grams per liter.

BACKGROUND

A need exists for a method for making a one component system ambienttemperature waterproof rubber coating.

A need exists for a method for making an ambient temperature waterproofrubber coating that requires no active heat for curing.

A further need exists for a method for making an ethylene propylenediene terpolymer (EPDM) waterproof rubber coating formed from a liquidthat does not require isocyanates or similar toxic chemicals.

A need exists for a method for making a formulation that can be appliedto existing roofs and existing substrates as a “cool white easilyapplied waterproof rubber coating” to lower the costs of energy andreduce maintenance costs of a facility.

The present embodiments meet these needs.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Before explaining the present method in detail, it is to be understoodthat the method is not limited to the particular embodiments and that itcan be practiced or carried out in various ways.

The present embodiments generally relate to a method for making ethylenepropylene diene terpolymer rubber coating compositions that are consumerfriendly to use and require no additional mixing of a curing agent as atwo component system.

The present embodiments relate to a method for making a durable ambientlight curable waterproof liquid rubber coating with volatile organiccompound (VOC) content of less than 450 grams per liter, such as withoutbenzene or xylene.

A benefit of the method is that the liquid rubber coating produced fromthe method is ambient temperature curable and devoid of thermallyactivated accelerators, so that through simple exposure to ambientlight, the liquid rubber coating curing is initiated without the need toadd an additional component or to add active heat to cure the rubberformulation.

A benefit of the method is that the liquid EPDM formulation produced bythe method is easy to apply in the field since it is a liquid and noheat source is needed to cure the formulation.

A benefit of the method is that users of the liquid EPDM formulationproduced by the method will avoid the possibility of having second orthird degree burns from applying the composition, because the coating is“heat free” to cure on a substrate which can be a roofing tile or flatroof base material. The formulation produced from the method does not“hold heat” but reflects heat.

A liquid EPDM formulation produced from the method creates a curedcoating that has (1) waterproof sealing to resist hurricane strengthrainfall; (2) resistance to acid rain degradation allowing at least 15years useful life for a roof in an acid rain area; (3) ability towithstand cold temperatures of down to −50 degrees Centigrade, such asArctic weather.

A durable ambient light curable waterproof rubber liquid coatingformulation produced from the method does not require isocyanates orsimilar toxic curing agents which are known to have a harmful effect onpeople as evidenced by allergic sensitization to isocyanates.

A durable ambient light curable waterproof liquid rubber coatingformulation produced from the method can be applied to existing roofsand existing substrates as a “cool white roof” material lowering thecost of building maintenance, lowering the cost of energy, and reducingthe dependence of the United States on foreign oil.

Schools, hospitals, public housing facilities, warehouses, residentialhomes, and facilities for the elderly can benefit from a durable ambientlight curable waterproof liquid rubber coating formulation produced fromthe method, on the roofs of their institutions because the material willremain cool, while simultaneously sealing the roof, providing areflective surface to reduce costs of energy and costs of maintainingthe facilities.

A cured material produced from the method can extend the life of a roof,reducing the need for roof replacement.

In other embodiments, the formulation produced from the method can beused to seal docks for marinas.

Another benefit of the method is that the cros slinking reactioncreating cured material is initiated in the presence of ambient lightwhich can be a light frequency that is visible, ultraviolet, orinfrared, causing the formulation produced from the method to be simpleto use.

The method saves time in application of the coating as no additionalequipment is needed to mix the formulation produced from the methodprior to application on the roof substrate, the dock, or anotherintended substrate.

A benefit of a durable ambient light curable waterproof liquid rubbercoating formulation produced from the method is that the invention isstable in its packaging system for delivery to a user.

The following terms are used herein:

The term “active heating” as used herein can refer to the externaladdition of energy to the formulation by the use of heat generatingdevices, such as adding energy through mechanical means with heatedapplication hoses, infrared lamps, heat guns, or by adding heat using anextruder.

The term “additive” as used herein can refer to an antioxidant, anultraviolet light stabilizer, or combinations thereof.

The term “adhesion promoter” as used herein can refer to a componentmade from molecules that tie the formed ambient light curable EPDMcoating to a substrate for enhanced bonding. An example of an adhesionpromoter can be SARET® 633 or 634 made by Arkema France.

The term “air release agent” can refer to mineral oil, paraffinic oil,silicone oil, or similar oil. An example of paraffinic oil can be FHRULTRA® made by Flint Hills Resources of Wichita, Kans., an example of amineral oil can be UNIQFORM™ made by UniqChem UK Co., Ltd., and anexample of an air release agent can be BYK®-320 made by BYK-Chemie GmbHof Germany.

The term “ambient light” as used herein can refer to visible,ultraviolet or near infrared light. The range of wavelength fromultraviolet to near infrared light can range in wavelength from 200nanometers to 1500 nanometers.

The term “ambient temperature” as used herein can refer to a temperatureless than 50 degrees Celsius and equal to or greater than −10 degreesCelsius.

The term “antioxidant” can refer to a hindered phenolic stabilizer, suchas IRGANOX® 1076 made by Ciba Specialty Chemicals Corporation ofTarrytown, N.Y.

The term “anti-settling agent” as used herein can refer to an agent thatprevents the settling of pigments and fillers in a liquid formulation.An example of a usable anti-settling agent can be M-P-A® made byElementis Specialties, Inc. of Hightstown, N.J. Another example is ahydroxyethyl cellulose. Still another example is a fumed silica.

The term “biocide” can be a variety of ingredients. Amethylchloroisothiazolinone, such as MERGAL® K9N made by TroyCorporation or ROCIMA™ 363 available from Dow Chemical of Midland, Mich.can be used.

The term “co-agent” as the term is used herein can refer to a reactivemolecule with two or more functional groups, for bonding with an EPDMmolecule. The co-agent can enhance crosslinking between two EPDMmolecules initiated by a photoinitiator. The term “enhances” can referto an accelerated process of crosslinking. Co-agent accelerates reactionof the free radicals with the active sites of the unsaturated diene tocross link the terpolymer.

Usable co-agents can include an acrylate such as hexane diol diacrylate,polybutadiene acrylate, a triallyl cyanurate, polybutadiene, andphenylenedimaleimide known as VAMAC® DP HVA-2 available from E.I. DuPontof Wilmington, Del.

The term “defoamer” as used herein can refer to components, such aspolymethyl alkyl siloxane. An example of a defoamer can be BYK®-A500defoamer. Defoamers can include modified polysiloxane orpolymethylsiloxane in solvents such as BYK®-066 N or BYK®-052 made byBYK-Chemie GmbH of Germany.

The term “flame retardant” as referred to herein can refer to a liquidor a powder flame retardant. The powdered version can be used in themethod at a different blending point than the liquid version. An exampleof a flame retardant usable herein is alumina trihydrate. Flameretardants can be used as fillers in this invention. Flame retardantscan be used as pigments in this invention.

The term “inert atmosphere” as used herein can refer to an atmosphereplaced over the reaction using an inert gas such as nitrogen or argon.

The term “low shear” as used herein can refer to mixing at a blade tipspeed of less than 2500 linear feet per minute used in the mixingdevice.

The term “molecular weight” for the polymer as used herein can refer toa weight average molecular weight as determined by gel permeationchromatography (GPC) measurement.

The term “photoinitiator” as used herein can refer to photoinitiatorsthat are devoid of thermally activated accelerators.

Usable photoinitiators include type I photoinitiators which can include:bis(2,4,6-trimethylbenzoyl)-phenyl phosphineoxide, known as IRGACURE®819 and 1-hydroxy-cyclohexyl-phenyl-ketone known as IRGACURE® 184 madeby BASF Corporation.

Type II photoinitiators can be usable and can include benzophenone,alpha hydroxyl ketone, alpha amino ketone, isothioxanthone, andcombinations thereof. All photoinitiators can remain devoid of thermallyactivated accelerators.

The term “pigment dispersant” can refer to a chemical that allowspigment to remain homogenously dispersed in the coating. Examples ofusable pigment dispersants include NUOSPERSE® 9100 available fromElementis Specialties, Inc.

The term “plant-based solvent” can refer to vegetable based, grassbased, weed based, nut based, or food based solvents including but notlimited to methyl soyate. Only solvents that dissolve EPDM or one of theother polymers are usable herein.

The term “plasticizer” as used herein can refer to non-volatileplasticizers, including paraffinic oil, silicone oil, naphthenic oil,plant based oil, diester oil, mineral oil, a low molecular weightpolyalpha olefin, or combinations thereof.

The term “terpolymer” as used herein can refer to a polymer of ethylene,propylene, and one or more non-conjugated dienes. Examples ofnon-conjugated diene usable herein can include norbornene, ethylidenenorbornene, 1,4, hexadiene, dicyclopentadiene, vinyl norbornene,methylene norbornene, and combinations thereof.

In other embodiments, the terpolymer of ethylene, propylene and one ormore non-conjugated dienes can have the propylene replaced by anotheralpha olefin, such as but not limited to 1-butene, 1-pentene, 1-hexene,1-heptene, 1-octene, or combinations thereof.

In embodiments, the “polymer” can be ethylene propylene polymer,ethylene butene polymer, ethylene pentene polymer, or combinationsthereof.

“Solvents” as the term is used herein can refer to an aliphatic solvent,an aromatic solvent, or a plant based solvent with a density from 0.6 to1.2 grams per cubic centimeter. Examples of usable solvents includemineral spirits, toluene, hexane, xylene, hexamethyldi-siloxane, orcombinations thereof.

The term “thermally activated accelerator” as the term is used hereincan refer to accelerators which require temperatures above ambienttemperatures to cure an EPDM coating and specifically require “activeheating.”

In a formulation produced by the method, no thermally activatedaccelerators are used, which is a feature of this method.

The term “ultraviolet stabilizers” can refer to chemicals such ashindered amine light stabilizers, benzotriazoles, or similar components.

The term “waterproof” as used herein can refer to a moisture vaporpermeation rating of less than 1.

The term “wetting agent” can refer to chemicals such as DISPONEk™ 983available from Elementis Specialties, Inc.

Wetting agents can include silicone polyacrylate copolymer in solventssuch as BYK®-3550 or a solvent-free polyether modifieddimethylpolysiloxane such as BYK®-378 made by BYK-Chemie GmbH ofGermany.

A formulation produced by the method can be coated onto varioussubstrates. Substrates that are usable with this formed ambient lightcurable waterproof liquid rubber coating can include roofs, aged PVCmaterials, aged EPDM roofing materials, aged thermoplastic olefinmaterials, metal, glass, car port roofs, docks, concrete, polyurethanefoam, acrylate material system, wood, oil rig mats, and high impactdevices.

The embodiments can include a method for making a durable ambient lightcurable waterproof liquid rubber formulation with a volatile organiccompound (VOC) content of less than 450 grams per liter.

The method involves blending in a closed vessel forming a solution, afirst portion of ethylene propylene diene terpolymer (EPDM) with a firstportion of solvent, wherein the ethylene propylene diene terpolymer(EPDM) is 50 weight percent to 99 weight percent of a total amount ofethylene propylene diene terpolymer used in a resulting durable ambientlight curable waterproof liquid rubber formulation and the first portionof solvents is 33 weight percent to 67 weight percent of a total amountof solvent used in the resulting durable ambient light curablewaterproof liquid rubber formulation.

The second step involves mixing the solution in a high shear mixer forat least 10 to 240 minutes at a temperature from 20 degrees Celsius to50 degrees Celsius forming a high viscosity solution.

As a third step, a second portion of ethylene propylene diene terpolymer(EPDM) is added to the high viscosity solution, wherein the secondportion of ethylene propylene diene terpolymer (EPDM) is 0.1 weightpercent to 50 weight percent of the total amount of ethylene propylenediene terpolymer (EPDM) used in the resulting durable ambient lightcurable waterproof liquid rubber formulation.

Next, a second portion of solvent is added to the high viscositysolution wherein the second portion of solvent is 33 weight percent to80 weight percent of a total amount of solvent used in the resultingdurable ambient light curable waterproof liquid rubber formulation.

As a fifth step, the high viscosity solution is blended for 10 minutesto 120 minutes at a temperature from 20 degrees Celsius to 50 degreesCelsius to form a low viscosity liquid intermediate rubber formulationwith a saturated backbone of propylene, a saturated backbone ofethylene, and an unsaturated diene with ultra violet activated sitescapable of crosslinking with or reacting with a free radical or a freeradical on another terpolymer.

For a sixth step, a co-agent is added to the low viscosity liquidintermediate rubber formulation to accelerate reaction of the freeradicals with the active sites of the unsaturated diene to cross linkthe terpolymer, wherein the co-agent is 0.01 weight percent to 10 weightpercent of the resulting durable ambient light curable waterproof liquidrubber formulation and the co-agent comprises at least one of: anacrylate, a triallyl cyanurate, a polybutadiene, and aphenylenedimaleimide.

As a seventh step, the low viscosity liquid intermediate rubberformulation is blended with the co-agent at a low shear rate for 10minutes to 120 minutes at a temperature from 20 degrees Celsius to 50degrees Celsius in the absence of ultraviolet light.

As the eighth step, a photoinitiator devoid of thermally activatedaccelerators is added to the low viscosity liquid intermediate rubberformulation to generate free radicals that react with the active sitesof the unsaturated diene, wherein the photoinitiator is 0.1 weightpercent to 10 weight percent of the resulting durable ambient lightcurable waterproof liquid rubber formulation; forming a durable ambientlight curable waterproof liquid rubber formulation devoid of thermallyactivated accelerators and adapted to crosslink and form a waterproofseal on a substrate only in the presence of ultraviolet light.

In embodiments, the method can also involve mixing the photoinitiatorsin a photoinitiator solvent prior to adding the photoinitiators to thelow viscosity liquid intermediate rubber formulation, wherein thephotoinitiator solvent is from 1 weight percent to 20 weight percentbased on the total solvent content of the resulting durable ambientlight curable waterproof liquid rubber formulation.

Photoinitiators include Type I photoinitiators including:bis(2,4,6-trimethylbenzoyl)-phenyl phosphineoxide, and1-hydroxy-cyclohexyl-phenyl-ketone.

Photoinitiators include Type II photoinitiators including benzophenone,alpha hydroxyl ketone, alpha amino ketone, isothioxanthone, andcombinations thereof. All photoinitiators are devoid of thermallyactivated accelerators.

In embodiments, the first portion of ethylene propylene diene terpolymercan have a different molecular weight than the second portion ofethylene propylene diene terpolymer.

In other embodiments, the method can involve adding to the highviscosity solution, at a temperature from 20 degrees Celsius to 50degrees Celsius, at least one of: (a) 50 weight percent to 99 weightpercent of a pigment, and (b) 50 weight percent to 99 weight percent ofa filler.

The amount of the pigment and the filler added represent a total weightpercent of pigment and filler in the high viscosity solution.

The method involves blending the pigment and filler to a particledispersion from 4 to 8 units on the Hegman scale.

In further embodiments, this method can involve adding to the lowviscosity liquid intermediate 0.1 weight percent to 10 weight percent ofadditives based on a total weight of the resulting durable ambient lightcurable waterproof liquid rubber formulation.

The additives are at least one of: a hindered phenolic stabilizer or ahindered amine ultraviolet stabilizer.

The method can also involve adding to the low viscosity liquidintermediate 0.1 weight percent to 10 weight percent of an adhesionpromoter based on the total weight of the resulting durable ambientlight curable waterproof liquid rubber formulation after adding thesecond portion of EPDM to the high viscosity solution.

The adhesion promoter is at least one of: a zinc diacrylate or a zincdimethacrylate.

In embodiments, the method can involve adding to the low viscosityliquid intermediate rubber formulation: 0.1 weight percent to 10 weightpercent of a pigment dispersant based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation.

The pigment dispersant can be 1 methoxy-2-propylacetate.

In further embodiments, the method can involve adding to the lowviscosity liquid intermediate rubber formulation: 0.1 weight percent to10 weight percent of an anti-settling agent based on the total weight ofthe resulting durable ambient light curable waterproof liquid rubberformulation.

The anti-settling agent is at least one of a hydroxylethyl cellulose anda fumed silica.

In other embodiments, the method can involve adding to the low viscosityliquid intermediate rubber formulation 0.1 weight percent to 10 weightpercent of a defoamer based on the total weight of the resulting durableambient light curable waterproof liquid rubber formulation.

The defoamer can be at least one of: a polymethyl alkyl siloxane, amodified polysiloxane, and a polymethylsiloxane in a solvent.

In embodiments, the method can involve adding to the low viscosityliquid intermediate rubber formulation 0.1 weight percent to 10 weightpercent of an air release agent based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation.

The air release agent can be at least one of: a mineral oil, aparaffinic oil, a silicone oil, or a similar oil.

In further embodiments, the method can involve adding 0.1 weight percentto 30 weight percent of a flame retardant to low viscosity liquidintermediate rubber formulation, based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation.

The flame retardant can be: an alumina trihydrate. Flame retardants canbe added to: a pigment, or a filler, and optionally an additive and thento the low viscosity liquid intermediate rubber formulation or after thesecond portion of ethylene propylene diene terpolymer is added to thehigh viscosity solution.

In still more embodiments, the method can involve adding to the lowviscosity liquid intermediate rubber formulation 0.1 weight percent to12 weight percent of a wetting agent based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation.

The wetting agent can be at least one of: a silicone polyacrylatecopolymer in solvent and a solvent-free polyether modifieddimethylpolysiloxane.

The method can also involve adding to the low viscosity liquidintermediate rubber formulation 0.1 weight percent to 10 weight percentof a biocide based on the total weight of the resulting durable ambientlight curable waterproof liquid rubber formulation.

The biocide can be a methylchloroisothiazolinone.

In embodiments, the method can involve adding 0.1 weight percent to 30weight percent of a low molecular weight non-volatile plasticizer lowviscosity liquid intermediate rubber formulation after the secondportion of solvent is added to the high shear mixture.

The low molecular weight non-volatile plasticizer can be a paraffinicoil, naphthenic oil, plant based oil, diester oil, silicone oil, amineral oil, a low molecular weight polyalphaolefin, or combinationsthereof.

In embodiments, the solvents can be selected from the group: mineralspirits and hexamethyldi-siloxane.

In embodiments, the first and second solvent portions can be differentsolvents.

In other embodiments, a durable ambient light curable waterproof liquidrubber coating formulation with a volatile organic compound content ofless than 450 grams per liter can be formed by first blending in aclosed vessel forming a solution, a first portion of ethylene propylenediene terpolymer (EPDM) with a first portion of solvent wherein theethylene propylene diene terpolymer (EPDM) is 50 weight percent to 99weight percent of a total amount of ethylene propylene diene terpolymerand the first portion of solvent is 33 weight percent to 67 weightpercent of a total amount of solvent used in a resulting formulation.

In other embodiments, as a second step the method can involve adding tothe solution 0.25 weight percent to 20 weight percent of a pigment basedon a total weight of the resulting formulation and 0.25 weight percentto 50 weight percent of a filler based on a total weight of theresulting formulation to form a mixture.

As a third step, the method can involve mixing the mixture in a highshear mixer at a temperature from 20 degrees Celsius to 50 degreesCelsius until the mixture forms a grinding base with a Hegman scalevalue from 4 to 8 with dispersed pigment and filler.

As a fourth step, the method can involve adding a second portion ofethylene propylene diene terpolymer (EPDM) to the grinding base, whereinthe second portion of ethylene propylene diene terpolymer (EPDM) is 1weight percent to 50 weight percent of the total amount of ethylenepropylene diene terpolymer (EPDM) used in a resulting durable ambientlight curable waterproof liquid rubber coating formulation.

As a fifth step, the method can involve adding a second portion ofsolvent to the grinding base and blending until all components areuniformly blended at a temperature from 20 degrees Celsius to 40 degreesCelsius forming an intermediate, wherein the second portion of solventis 33 weight percent to 67 weight percent of the total amount of solventused in a resulting formulation.

In embodiments, as a sixth step, the method can involve adding 0.01weight percent to 10 weight percent of a co-agent to the intermediate,wherein the co-agent is comprises at least one of: an acrylate, atriallyl cyanurate, a polybutadiene, or a phenylenedimaleimide, andblending the intermediate with the co-agent at a low shear rate for 10minutes to 120 minutes at a temperature from 20 degrees Celsius to 40degrees Celsius in the absence of ultraviolet light.

In further embodiments, as a seventh step, the method can involve adding0.1 weight percent to 10 weight percent of a photoinitiator devoid ofthermally activated accelerators to the intermediate and forming adurable ambient light curable waterproof liquid rubber formulationdevoid of thermally activated accelerators, wherein the formulation isadapted to crosslink and form a waterproof seal on a substrate only inthe presence of ultraviolet light.

The coating can be formed by first blending in a closed vessel forming asolution, a first portion of EPDM with a first portion of solvent,wherein the EPDM is 50 weight percent to 99 weight percent of a totalamount of ethylene propylene diene terpolymer (EPDM) and the firstportion of solvent is 33 weight percent to 67 weight percent of a totalamount of solvent used in the resulting formulation.

As a second step, various components can be added to the solution, suchas (i) 0.25 weight percent to 20 weight percent of a pigment based on atotal weight of the resulting formulation; (ii) 0.25 weight percent to50 weight percent of a filler based on a total weight of the resultingformulation to form a mixture; and (iii) 0.5 weight percent to 10 weightpercent of additives based on a total weight of the resultingformulation. These three components can be added while mixing thesolution in a high shear mixer for at least 10 minutes to 240 minutes ata temperature from 20 degrees Celsius to 50 degrees Celsius forming ahigh shear mixture.

As a third step, a second portion of EPDM can be added to the high shearmixture, wherein the second portion of EPDM can be 0.1 weight percent to50 weight percent of the total amount of EPDM used in the resultingformulation.

As a fourth step, a second portion of solvent can be added to the highshear mixture and blended for 10 minutes to 60 minutes at a temperaturefrom 20 degrees Celsius to 40 degrees Celsius to form an intermediate,wherein the second portion of solvent can be 33 weight percent to 67weight percent of the total amount of solvent used in the resultingformulation.

As a fifth step, a photoinitiator can be added to the intermediatewherein the photoinitiator is 0.1 weight percent to 10 weight percent ofthe resulting formulation.

As a sixth step, a co-agent can be added to the intermediate wherein theco-agent is 0.01 weight percent to 10 weight percent of the resultingformulation, and wherein the co-agent comprises at least one of: anacrylate, a triallyl cyanurate, a polybutadiene, a phenylenedimaleimide,and combinations thereof.

The photoinitiator and the co-agent can be added while continuing toblend the intermediate with the co-agent at a low shear rate for 10minutes to 120 minutes at a temperature from 20 degrees Celsius to 40degrees Celsius in the absence of light forming the durable ambientlight curable waterproof liquid rubber coating devoid of thermallyactivated accelerators, wherein the durable ambient light curablewaterproof liquid rubber formulation is adapted to form a waterproofseal on a substrate in the presence of light.

In an embodiment, the method can use a first portion of EPDM with adifferent molecular weight than the second portion of EPDM.

In an embodiment, the method can involve the mixing of the pigments andfillers with the EPDM in an inert atmosphere.

In an embodiment, the method can involve adding 0.1 weight percent to 5weight percent of an adhesion promoter based on the total weight of theresulting formulation after adding the second portion of EPDM to thehigh shear mixture.

In still another embodiment, the method can involve adding 0.1 weightpercent to 5 weight percent of a pigment dispersant based on the totalweight of the resulting formulation, before adding the pigments,fillers, and additives.

In an embodiment, the method can include adding 0.1 weight percent to 5weight percent of an anti-settling agent based on the total weight ofthe resulting formulation, after the second portion of EPDM is added tothe high shear mixture.

In an embodiment, the method can involve adding 0.1 weight percent to 3weight percent of a defoamer based on the total weight of the resultingformulation, after pigment, filler and additive addition.

In an embodiment, the method can involve adding 0.1 weight percent to 3weight percent of an air release agent based on the total weight of theresulting formulation after the second portion of EPDM is added to thehigh shear mixture.

In yet another embodiment, the method can involve adding 0.1 weightpercent to 30 weight percent of a flame retardant based on the totalweight of the resulting formulation, either (a) with the pigment,filler, and additives, or (b) after the second portion of EPDM is addedto the high shear mixture.

In an embodiment, the method can involve adding 0.1 weight percent to 5weight percent of a wetting agent based on the total weight of theresulting formulation, after the second portion of EPDM is added to thehigh shear mixture.

The method can also involve adding 0.1 weight percent to 3 weightpercent of a biocide based on the total weight of the resultingformulation, after the second portion of EPDM is added to the high shearmixture.

In an embodiment, the method can include adding 0.1 weight percent to 30weight percent of a low molecular weight non-volatile plasticizer basedon the total weight of the resulting formulation, after the secondportion of solvent is added to the high shear mixture, wherein the lowmolecular weight non-volatile plasticizer comprises: a paraffinic oil,naphthenic oil, plant based oil, diester oil, silicone oil, a mineraloil, a low molecular weight polyalphaolefin, or combinations thereof.

The invention can include creating a special waterproof formulation withlow volatile organic compound content. The volatile organic compoundcontent can be less than 450 and as low as 0.1 volatile organic contentgrams per liter.

In further embodiments the formulation can be for a durable ambientlight curable waterproof liquid rubber coating formulation with avolatile organic compound content of less than 450 grams per liter.

This formulation can be comprised of a first portion of ethylenepropylene diene terpolymer (EPDM), wherein the ethylene propylene dieneterpolymer (EPDM) is 50 weight percent to 99 weight percent of a totalamount of ethylene propylene diene terpolymer.

This formulation can further be comprised of a first portion of solvent,wherein the first portion of solvent is 33 weight percent to 67 weightpercent of a total amount of solvent used in a resulting formulation.

Additionally, this formulation can be comprised of 0.25 weight percentto 20 weight percent of a pigment based on a total weight of theresulting formulation.

Further, this formulation can be comprised of 0.25 weight percent to 50weight percent of a filler based on a total weight of the resultingformulation.

This formulation can be further comprised of 1 weight percent to 50weight percent of ethylene propylene diene terpolymer (EPDM) based on atotal weight of the resulting formulation.

The formulation can also be comprised of 33 weight percent to 67 weightpercent of a second portion of solvent based on a total weight of theresulting formulation.

Further, the formulation can be comprised of 0.01 weight percent to 10weight percent of a co-agent based on a total weight of the resultingformulation, wherein the co-agent is comprises at least one of: anacrylate, a triallyl cyanurate, a polybutadiene, or aphenylenedimaleimide

The formulation can further be comprised of 0.1 weight percent to 10weight percent of a photoinitiator devoid of thermally activatedaccelerators based on a total weight of the resulting formulation andforming a durable ambient light curable waterproof liquid rubberformulation devoid of thermally activated accelerators, wherein theformulation is adapted to crosslink and form a waterproof seal on asubstrate only in the presence of ultraviolet light.

The formulation can be for a durable ambient light curable waterproofliquid rubber coating with a volatile organic compound content of lessthan 450 grams per liter.

The formulation can include 40 weight percent to 95 weight percent basedon a total weight of a resulting durable ambient light curablewaterproof liquid rubber formulation of a liquid ethylene propylenediene terpolymer (EPDM), wherein the polymer has a backbone consistingof from 1 weight percent to 50 weight percent of a non-conjugated dienein a random ethylene propylene copolymer, and further the polymer has aweight average molecular weight less than 60,000, an ethylene propyleneratio from 35:65 to 80:20 ethylene to propylene; a specific gravity of0.83 to 0.95; and a glass transition temperature of from −60 degreesCelsius to −30 degrees Celsius.

Additionally the formulation can include 0.1 weight percent to 25 weightpercent of a solvent based on the total weight of the resulting durableambient light curable waterproof liquid rubber formulation, wherein thesolvent comprises at least one of:

an aliphatic solvent, an aromatic solvent, a plant-based solvent, andcombinations thereof.

Critical in the formulation can be 0.1 weight percent to 10 weightpercent based on the total weight of the resulting durable ambient lightcurable waterproof liquid rubber formulation of a photoinitiator devoidof thermally activated accelerators.

The photoinitiator can be a type I photoinitiators includingbis(2,4,6-trimethylbenzoyl)-phenyl phosphineoxide,1-hydroxy-cyclohexyl-phenyl ketone and combinations thereof, or a typeII photoinitiators including benzophenone; alpha hydroxyl ketone, alphaamino ketone; isothioxanthone; and combinations thereof.

The formulation can include 0.5 weight percent to 10 weight percent ofan additive based on the total weight of the resulting durable ambientlight curable waterproof liquid rubber formulation that is anantioxidant, an ultraviolet light stabilizer, and combinations thereof.

The formulation can include 0.25 weight percent to 20 weight percent ofa pigment based on a total weight of the resulting durable ambient lightcurable waterproof liquid rubber formulation.

The formulation can include 0.25 weight percent to 50 weight percent ofa filler based on a total weight of the resulting durable ambient lightcurable waterproof liquid rubber formulation.

The formulation can include 0.01 weight percent to 10 weight percent ofa co-agent to the low viscosity liquid intermediate rubber formulation,wherein the co-agent can be selected from the group comprising: anacrylate, a triallyl cyanurate, a polybutadiene, a phenylenedimaleimide,and combinations thereof.

It should be noted that the durable ambient light curable waterproofliquid rubber formulation can be curable with no active heating in thepresence of ambient light without addition of another curative, andfurther wherein the resulting durable ambient light curable waterproofliquid rubber formulation has an uncured viscosity from 1,000 to 50,000centipoise and a VOC content of 450 grams per liter or less and whencured, the cured coating can have a tensile strength greater than 250psi when cured, an elongation greater than 50 percent when cured, aShore A hardness from 40 to 70 when cured, and wherein the durableambient light curable waterproof liquid rubber formulation when curedcan be waterproof with adhesion to a substrate.

In an embodiment, the formulation can use a filler that can be silica,clay, talc, calcium carbonate, aluminum tri hydroxide, other mineralfillers, and combinations thereof.

In an embodiment, the formulation can use a pigment that can be titaniumdioxide, zinc sulfide, phthalocyanine blue, naphthol red, azo red, azoyellow, carbon black, iron oxide, and combinations thereof.

In an embodiment, the formulation can use 0.01 weight percent to 30weight percent based on the total weight of the resulting durableambient light curable waterproof liquid rubber formulation of a lowmolecular weight non-volatile plasticizer that can be silicone oil,aromatic oil, paraffinic oil, naphthenic oil, vegetable oil, diesteroil, mineral oil, a low molecular weight polyalphaolefin, andcombinations thereof.

In an embodiment, the formulation can include 0.1 weight percent to 3weight percent of a defoamer based on the total weight of the resultingdurable ambient light curable waterproof liquid rubber formulationcomprising a polymethyl alkyl siloxane, butyl glycolate, or a polyethylglycol monooleate.

In an embodiment, the formulation can use 0.1 weight percent to 3 weightpercent of an air release agent based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation comprising a mineral oil, a paraffinic oil, or a siliconeoil.

In an embodiment, the formulation can use 0.1 weight percent to 3 weightpercent of a biocide based on the total weight of the resulting durableambient light curable waterproof liquid rubber formulation comprising amethylchloroisothiazolinone.

In an embodiment, the formulation can use 0.1 weight percent to 5 weightpercent of a wetting agent based on the total weight of the resultingdurable ambient light curable waterproof liquid rubber formulationcomprising a silicone polyacrylate copolymer in solvent, a solvent-freepolyether modified dimethylpolysiloxane, or a 1 methoxy propaynolacetate.

In an embodiment, the formulation can use 0.1 weight percent to 30weight percent of a flame retardant based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation comprising an alumina-trihydrate.

In an embodiment, the formulation can use 0.1 weight percent to 5 weightpercent of an anti-settling agent based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation comprising a hydroxylethyl cellulose.

In an embodiment, the formulation can use 0.1 weight percent to 5 weightpercent of a pigment dispersant based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation comprising 1 methoxy-2-propylacetate.

In an embodiment, the formulation can use 0.1 weight percent to 5 weightpercent of an adhesion promoter based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation that can be a silane, a zinc di-methyacrylate with orwithout alkylated phenols, a zinc di-acrylate with an alkylated phenol,a fatty ester, or combinations thereof.

In an embodiment, the formulation can use a hindered amine lightstabilizer, benzophenone, benzotriazole, hindered phenolic stabilizer,or combinations thereof as the additive.

In an embodiment, the formulation can use 0.5 weight percent to 10weight percent based on the total weight of the resulting durableambient light curable waterproof liquid rubber formulation of anadditive comprising an antioxidant or an ultraviolet light stabilizer.

In an embodiment, the formulation can use as the solvent mineralspirits, a toluene, a hexane, a palm oil, a turpentine, a xylene, orcombinations thereof.

In an embodiment, the formulation can use 0.25 weight percent to 20weight percent of a pigment based on the total weight of the resultingdurable ambient light curable waterproof liquid rubber formulationcomprising titanium dioxide, zinc sulfide, phthalocyanine blue, naphtholred, azo red, azo yellow, carbon black, iron oxide, or combinationsthereof.

The following procedure relates to an order of addition in oneembodiment of a method for making a durable ambient light curablewaterproof liquid rubber formulation.

First, mix 50 percent of the total formulation amount of EPDM polymerand 50 percent of the total formulation amount of mineral spirits (asolvent) in a vessel. Mix the components at a temperature from 20degrees Celsius to 50 degrees Celsius until a smooth homogenous solutionis formed.

Add the remaining 50 percent of the total formulation amount of EPDM tothe solution and continue mixing at a temperature from 20 degreesCelsius to 50 degrees Celsius until all of the EPDM is thoroughly mixedforming a smooth viscous solution.

Into this smooth viscous solution, slowly add 100 percent of the totalamount of filler used in the durable ambient light curable waterproofliquid rubber formulation and 100 percent of the total amount of pigment(if a pigment is used) used in the durable ambient light curablewaterproof liquid rubber formulation.

Once the filler and the pigment (if used) are added, mix at atemperature of from 20 degrees Celsius to 50 degrees Celsius until themixture forms a smooth grind base. The grind base is mixed to from 4 to8 on the Hegman scale.

Add the remaining 50 percent of the total amount of solvent(specifically mineral spirits) used in the durable ambient light curablewaterproof liquid rubber formulation and 100 percent of the total amountof plasticizers used in the durable ambient light curable waterproofliquid rubber formulation to the grind base.

Mix at a temperature from 20 degrees Celsius to 50 degrees Celsius untilall of the solvent and plasticizers are thoroughly incorporated into thesolution.

Add in 100 percent of the total formulation amount of any additives thatmay be used, which can include wetting agents, defoamers, antioxidants,hindered amine light stabilizers, UV absorbers, flame retardants, airrelease agents, biocides, anti-settling agents, pigment dispersants, andadhesion promoters.

Mix at a temperature from 20 degrees Celsius to 50 degrees Celsius untilall of the additives are thoroughly incorporated into the solution. Thesolution is mixed to from a 4 to 8 on the Hegman scale.

Into a separate vessel prepare a solution of 100 percent of aphotoinitiator solvent (such as Toluene) and 100 percent of thephotoinitiators used in the durable ambient light curable waterproofliquid rubber formulation.

Mix the photoinitiator solvent and the photoinitiators at a temperaturefrom 20 degrees Celsius to 50 degrees Celsius until all of thephotoinitiators are dissolved and thoroughly mixed into the solution.

Add 100 percent of the total formulation amount of the photoinitiatorssolution to the mixture containing the EPDM, solvent (mineral spirits),filler, pigment, and additives.

Mix at a temperature from 20 degrees Celsius to 50 degrees Celsius untilall of the components are thoroughly incorporated into the solution andthe solution is from 4 to 8 on the Hegman scale.

EXAMPLE 1

1006-94-2 Component Ingredient % EPDM Polymer Trilene 5131 Lot GE2G01536.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat 34.39 SolventMineral Spirits 20.87 Plasticizer Dow Corning 200 Fluid 0.36 Co-agent SR540 2.71 Curative Irgacure 819 0.36 Solvent Toluene 3.26 Viscosity (cP)15900 VOC (gms/L) 258

EXAMPLE 2

Component Ingredient % EPDM Polymer Trilene 65 Standard 30.72Polybutadiene Resin Ricon 156 2.56 Solvent Mineral Spirit 15.37 SolventHMDS Solvent 23.04 Curative Irgacure 819 2.05 Solvent Toluene 8.19Hindered Amine Light Stabilizer TINUVIN 292 (HALS) 0.15 Pigment TiO210.24 Filler Cupsil 6508 Silica 7.68 Estimated VOC g/L 236 Viscosity(cP) 6480

EXAMPLE 3

Formulation with Defoamer Component Ingredient % EPDM Polymer Trilene5131 36.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat 34.39Solvent Mineral Spirits 10.87 Plasticizer Dow Corning 200 Fluid 0.36Co-agent SR 540 2.71 Curative Irgacure 819 0.36 Solvent Toluene 3.26Defoamer BYK 052 10.00

EXAMPLE 4

Formulation with Anti-Settling Agent Component Ingredient % EPDM PolymerTrilene 5131 36.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat34.39 Solvent Mineral Spirits 10.87 Plasticizer Dow Corning 200 Fluid0.36 Co-agent SR 540 2.71 Curative Irgacure 819 0.36 Solvent Toluene3.26 Anti-Settling Agent MPA 1078 10.00

EXAMPLE 5

Formulation with Flame Retardant Component Ingredient % EPDM PolymerTrilene 5131 36.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat14.39 Solvent Mineral Spirits 10.87 Plasticizer Dow Corning 200 Fluid0.36 Co-agent SR 540 2.71 Curative Irgacure 819 0.36 Solvent Toluene3.26 Flame Retardant ATH 30.00

EXAMPLE 6

Formulation with Pigment Dispersant Component Ingredient % EPDM PolymerTrilene 5131 36.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat29.39 Solvent Mineral Spirits 10.87 Plasticizer Dow Corning 200 Fluid0.36 Co-agent SR 540 2.71 Curative Irgacure 819 0.36 Solvent Toluene3.26 Flame Retardant ATH 5.00 Pigment Dispersant Nuosperse 9100 10.00

EXAMPLE 7

Formulation with Biocide Component Ingredient % EPDM Polymer Trilene5131 36.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat 34.39Solvent Mineral Spirits 10.87 Plasticizer Dow Corning 200 Fluid 0.36Co-agent SR 540 2.71 Curative Irgacure 819 0.36 Solvent Toluene 3.26Biocide Mergal K9N 10.00

EXAMPLE 8

Formulation with Adhesion Promoter Component Ingredient % EPDM PolymerTrilene 65 30.72 Polybutadiene Resin Ricon 156 2.56 Solvent MineralSpirits 10.37 Solvent HMDS Solvent 18.04 Curative Irgacure 819 2.05Solvent Toluene 8.19 Adhesion Promoter SR 634 10.00 Pigment Kronos 230010.24 Filler Coupsil 6508 7.83

EXAMPLE 9

Formulation with Air Release Component Ingredient % EPDM Polymer Trilene65 30.72 Polybutadiene Resin Ricon 156 2.56 Solvent Mineral Spirits10.37 Solvent HMDS Solvent 18.04 Curative Irgacure 819 2.05 SolventToluene 8.19 Air Release Agent Ultra 1199 10.00 Pigment Kronos 230010.24 Filler Coupsil 6508 7.83

EXAMPLE 10

Formulation with Wetting Agent Component Ingredient % EPDM PolymerTrilene 5131 36.20 Pigment Kronos 2300 1.85 Filler 10WC Woolastocoat34.39 Solvent Mineral Spirits 10.87 Plasticizer Dow Corning 200 Fluid0.36 Co-agent SR 540 2.71 Curative Irgacure 819 0.36 Solvent Toluene3.26 Wetting Agent BYK 378 10.00

While these embodiments have been described with emphasis on theembodiments, it should be understood that within the scope of theappended claims, the embodiments might be practiced other than asspecifically described herein.

What is claimed is:
 1. A method for making a durable ambient lightcurable waterproof liquid rubber formulation with a volatile organiccompound content of less than 450 grams per liter, comprising: a.blending in a closed vessel forming a solution, a first portion ofethylene propylene diene terpolymer (EPDM) with a first portion ofsolvent, wherein the ethylene propylene diene terpolymer (EPDM) is 50weight percent to 99 weight percent of a total amount of ethylenepropylene diene terpolymer used in a resulting durable ambient lightcurable waterproof liquid rubber formulation and the first portion ofsolvent is 33 weight percent to 67 weight percent of a total amount ofsolvent used in the resulting durable ambient light curable waterproofliquid rubber formulation; b. mixing the solution in a high shear mixerfor at least 10 to 240 minutes at a temperature from 20 degrees Celsiusto 50 degrees Celsius forming a high viscosity solution; c. adding asecond portion of ethylene propylene diene terpolymer (EPDM) to the highviscosity solution, wherein the second portion of ethylene propylenediene terpolymer (EPDM) is 0.1 weight percent to 50 weight percent ofthe total amount of ethylene propylene diene terpolymer (EPDM) used inthe resulting durable ambient light curable waterproof liquid rubberformulation; d. adding a second portion of solvent to the high viscositysolution wherein the second portion of solvent is 33 weight percent to80 weight percent of a total amount of solvent used in the resultingdurable ambient light curable waterproof liquid rubber formulation; e.blending the high viscosity solution for 10 minutes to 120 minutes at atemperature from 20 degrees Celsius to 50 degrees Celsius to form a lowviscosity liquid intermediate rubber formulation with a saturatedbackbone of propylene, a saturated backbone of ethylene, and anunsaturated diene with ultra violet activated sites for crosslinkingwith or reacting with a free radical or a free radical on anotherterpolymer; f. adding a co-agent to the low viscosity liquidintermediate rubber formulation to accelerate reaction of the freeradicals with the active sites of the unsaturated diene to cross linkthe terpolymer, wherein the co-agent is 0.01 weight percent to 10 weightpercent of the resulting durable ambient light curable waterproof liquidrubber formulation and the co-agent comprises at least one of: anacrylate, a triallyl cyanurate, a polybutadiene, and aphenylenedimaleimide; and g. blending the low viscosity liquidintermediate rubber formulation with the co-agent at a low shear ratefor 10 minutes to 120 minutes at a temperature from 20 degrees Celsiusto 50 degrees Celsius in the absence of ultraviolet light; and h. addinga photoinitiator devoid of thermally activated accelerators to the lowviscosity liquid intermediate rubber formulation to generate freeradicals that react with the active sites of the unsaturated diene,wherein the photoinitiator is 0.1 weight percent to 10 weight percent ofthe resulting durable ambient light curable waterproof liquid rubberformulation; wherein the photoinitiator is from 1 weight percent to 20weight percent based on the total solvent content of the resultingdurable ambient light curable waterproof liquid rubber formulation,wherein photoinitiators include Type I photoinitiators including: bis(2,4,6-trimethylbenzoyl)-phenyl phosphineoxide, and1-hydroxy-cyclohexyl-phenyl-ketone; and Type II photoinitiators includebenzophenone, alpha hydroxyl ketone, alpha amino ketone,isothioxanthone, and combinations thereof, and wherein allphotoinitiators are devoid of thermally activated accelerators; and i.forming a durable ambient light curable waterproof liquid rubberformulation devoid of thermally activated accelerators and adapted tocrosslink and form a waterproof seal on a substrate only in the presenceof ultraviolet light without the addition of heat.
 2. The method ofclaim 1, wherein the first portion of ethylene propylene dieneterpolymer has a different molecular weight than the second portion ofethylene propylene diene terpolymer.
 3. The method of claim 1,comprising: a. adding to the high viscosity solution at a temperaturefrom 20 degrees Celsius to 50 degrees Celsius, at least one of: (i) 50weight percent to 99 weight percent of a pigment; and (ii) 50 weightpercent to 99 weight percent of a filler; wherein the amount of thepigment and the filler added represent a total weight percent of pigmentand filler in the high viscosity solution; and b. blending the pigmentand filler to a particle dispersion from 4 to 8 units on the Hegmanscale.
 4. The method of claim 1, further comprising adding to the lowviscosity liquid intermediate 0.1 weight percent to 10 weight percent ofadditives based on a total weight of the resulting durable ambient lightcurable waterproof liquid rubber formulation and the additives are atleast one of: a hindered phenolic stabilizer or a hindered amineultraviolet stabilizer.
 5. The method of claim 1, further comprising:adding to the low viscosity liquid intermediate 0.1 weight percent to 10weight percent of an adhesion promoter based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation after adding the second portion of ethylene propylene dieneterpolymer (EPDM) to the high viscosity solution, wherein the adhesionpromoter is at least one of: a zinc diacrylate or zinc dimethacrylate.6. The method of claim 1, further comprising: adding to the lowviscosity liquid intermediate rubber formulation: 0.1 weight percent to10 weight percent of a pigment dispersant based on the total weight ofthe resulting durable ambient light curable waterproof liquid rubberformulation, wherein the pigment dispersant is 1 methoxy-2-propylacetate.
 7. The method of claim 1, further comprising: adding to thelow viscosity liquid intermediate rubber formulation: 0.1 weight percentto 10 weight percent of an anti-settling agent based on the total weightof the resulting durable ambient light curable waterproof liquid rubberformulation, wherein the anti-settling agent is at least one of ahydroxyl ethyl cellulose and a fumed silica.
 8. The method of claim 1,further comprising: adding to the low viscosity liquid intermediaterubber formulation 0.1 weight percent to 10 weight percent of a defoamerbased on the total weight of the resulting durable ambient light curablewaterproof liquid rubber formulation, and wherein the defoamer is atleast one of: a polymethyl alkyl siloxane, a modified polysiloxane, anda polymethylsiloxane in a solvent.
 9. The method of claim 1, furthercomprising adding to the low viscosity liquid intermediate rubberformulation 0.1 weight percent to 10 weight percent of an air releaseagent based on the total weight of the resulting durable ambient lightcurable waterproof liquid rubber formulation, wherein the air releaseagent comprises at least one of: a mineral oil, a paraffinic oil, asilicone oil, or a similar oil.
 10. The method of claim 3, furthercomprising: adding 0.1 weight percent to 30 weight percent of a flameretardant to low viscosity liquid intermediate rubber formulation, basedon the total weight of the resulting durable ambient light curablewaterproof liquid rubber formulation, wherein the flame retardantcomprises: an alumina trihydrate, by adding: a. with a member of atleast one of: a pigment, a filler, and an additives to the low viscosityliquid intermediate rubber formulation; or b. after the second portionof ethylene propylene diene terpolymer is added to the high viscositysolution.
 11. The method of claim 1, further comprising: adding to thelow viscosity liquid intermediate rubber formulation 0.1 weight percentto 12 weight percent of a wetting agent based on the total weight of theresulting durable ambient light curable waterproof liquid rubberformulation, wherein the wetting agent is at least one of: a siliconepolyacrylate copolymer in solvent and a solvent-free polyether modifieddimethylpolysiloxane.
 12. The method of claim 1, further comprising:adding to the low viscosity liquid intermediate rubber formulation 0.1weight percent to 10 weight percent of a biocide based on the totalweight of the resulting durable ambient light curable waterproof liquidrubber formulation, wherein the biocide is amethylchloroisothiazolinone.
 13. The method of claim 1, furthercomprising: adding 0.1 weight percent to 30 weight percent of a lowmolecular weight non-volatile plasticizer low viscosity liquidintermediate rubber formulation after the second portion of solvent isadded to the high shear mixture, wherein the low molecular weightnon-volatile plasticizer comprises: a paraffinic oil, naphthenic oil,plant based oil, diester oil, silicone oil, a mineral oil, a lowmolecular weight polyalphaolefin, or combinations thereof.
 14. Themethod of claim 1, wherein the first portion of solvent and the secondportion of solvent are selected from the group: mineral spirits andhexamethyldi-siloxane.
 15. The method of claim 14, wherein the firstportion of solvent and the second portion of solvent can be differentsolvents.
 16. A method for making a durable ambient light curablewaterproof liquid rubber coating formulation with a volatile organiccompound content of less than 450 grams per liter, comprising: a.blending in a closed vessel forming a solution, a first portion ofethylene propylene diene terpolymer (EPDM) with a first portion ofsolvent, wherein the ethylene propylene diene terpolymer (EPDM) is 50weight percent to 99 weight percent of a total amount of ethylenepropylene diene terpolymer and the first portion of solvent is 33 weightpercent to 67 weight percent of a total amount of solvent used in aresulting formulation; b. adding to the solution: (i) 0.25 weightpercent to 20 weight percent of a pigment based on a total weight of theresulting formulation; and (ii) 0.25 weight percent to 50 weight percentof a filler based on a total weight of the resulting formulation to forma mixture; c. mixing the mixture in a high shear mixer at a temperaturefrom 20 degrees Celsius to 50 degrees Celsius until the mixture forms agrinding base with a Hegman scale value from 4 to 8 with dispersedpigment and filler; d. adding a second portion of ethylene propylenediene terpolymer (EPDM) to the grinding base, wherein the second portionof ethylene propylene diene terpolymer (EPDM) is 1 weight percent to 50weight percent of the total amount of ethylene propylene dieneterpolymer (EPDM) used in a resulting durable ambient light curablewaterproof liquid rubber coating formulation; e. adding a second portionof solvent to the grinding base and blending until all components areuniformly blended at a temperature from 20 degrees Celsius to 40 degreesCelsius forming an intermediate, wherein the second portion of solventis 33 weight percent to 67 weight percent of the total amount of solventused in a resulting formulation; f. adding 0.01 weight percent to 10weight percent of a co-agent to the intermediate, wherein the co-agentis comprises at least one of: an acrylate, a triallyl cyanurate, apolybutadiene, or a phenylenedimaleimide, and blending the intermediatewith the co-agent at a low shear rate for 10 minutes to 120 minutes at atemperature from 20 degrees Celsius to 40 degrees Celsius in the absenceof ultraviolet light; and g. adding 0.1 weight percent to 10 weightpercent of a photoinitiator devoid of thermally activated acceleratorsto the intermediate and forming a durable ambient light curablewaterproof liquid rubber formulation devoid of thermally activatedaccelerators, wherein the formulation is adapted to crosslink and form awaterproof seal on a substrate only in the presence of ultravioletlight.